One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,9)(6,10)(7,8)(11,12)(13,15)(14,16)(17,18,22,23)(19,25,20,24)(21,29,30,26)(27,31,28,32)(33,34,39,43)(35,42,46,40)(36,38,37,41)(44,45,47,48)(1,2,6,10)(3,7,8,4)(5,9,14,16)(11,15,13,12)(18,23)(24,25)(26,29)(31,32)(33,35)(34,40)(36,47)(37,44)(38,45)(39,46)(41,48)(42,43)(17,19,22,20)(18,24,23,25)(21,27,30,28)(26,31,29,32)(33,36,39,37)(34,41,43,38)(35,44,46,47)(40,45,42,48)(1,3)(2,7)(4,10)(5,13)(6,8)(9,12)(11,14)(15,16)(17,20,22,19)(18,25,23,24)(21,27,30,28)(26,31,29,32)(33,37,39,36)(34,38,43,41)(35,44,46,47)(40,45,42,48)(1,4,6,7)(2,8,10,3)(5,12,14,15)(9,13,16,11)(17,18)(19,24)(20,25)(21,26)(22,23)(27,31)(28,32)(29,30)(33,35)(34,42)(36,44)(37,47)(38,45)(39,46)(40,43)(41,48)(1,5,6,14)(2,9,10,16)(3,11,8,13)(4,12,7,15)(17,21)(18,26)(19,27)(20,28)(22,30)(23,29)(24,31)(25,32)(33,38)(34,36)(35,45)(37,43)(39,41)(40,47)(42,44)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.